Nelson Associates, I. (1969). Public library systems in the United States: A survey of multijurisdictional systems.
Citación estilo ChicagoNelson Associates, Inc. Public Library Systems in the United States: A Survey of Multijurisdictional Systems. 1969.
Cita MLANelson Associates, Inc. Public Library Systems in the United States: A Survey of Multijurisdictional Systems. 1969.
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